Ore crushing and pulverizing machinery.



I A. M. BEAM. ORE OB USH ING AND PULVERIZING MACHINERY.

(Application 11106. Apr. 19, 1900.)

(No Model.)

4 1* W M w M -A TTORNEY.

ren'r OFFICE.

ARON M. BEAM, OF DENVER, COLORADO.

ORE CRUSHING ANDP ULVERIZING MACHINERY.

SPECIFICATION forming part of Letters Patent N 0. 691,582, dated January 21, 1902. Application filed April 19. 1901). Serial No.13 .5] 2. (No model.)

To (4% whom it may concernfi Be it known that I, ARON M. BE AM, a citizen of the United States of America, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Combined Ore Crushing and Pulverizing Machinery; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part ofv this specification.

My invention relates to improvements in rock crushingand pulverizing machinery; and the objects of my invention are, first, to provide a combined rock crushing and pulverizing machine that will take small pieces of rock and reduce them to a pulverulent condition at one operation; second, to provide a pulverizing device that can be easily,quickly, and cheaply applied to the rock crushing rolls at present in use thatwill greatly increase their crushing capacity; third, to provide a simple, cheap, and durable rock-pulverizing device. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a side elevation, partlyin section, of my crushing and pulverizing machine. Fig. 2 is a fragmentary View of another modification of my invention. Fig. 3 is a fragmentary perspective view of another modification of myinvention. Fig. 4 is a cross-section of the grinding-shoe, showing it provided with a chamber and water inlet and outlet pipes connected to the chamber.

Similar figures of reference refer to similar parts throughout the several views.

Referring to the drawings, the numeral 1 designates the bed-plate of the machine. It is provided at its ends with standards 2,between which the blocks 5 and 6 are mounted on the bed-plate. The block 5 is secured to the bedplate. These blocks support in suitable bearings formed in them the shafts 5 and 6". To these shafts crushing-rollers 7 and 8 are secured, with their peripheral faces close together and their sides parallel with each other.

The bearing-block 6 is slidably mounted on toadjust the tension of the buffer.

the bed-plate,and a bulfer of rubber or other suitable material 9 is placed between it and I the adjacent end standard. A bolt 10,which is threaded through thestandard, is arranged The slidable bearing-block, buffer, and adjusting screwenable the roll 6" to be adjusted against the surface of the opposite roller or to be placed at any desired distance from it and also make a yielding resilient su pport,which enables the roll 6 to more back away from the roll 5'whenever a substance too hard to crush gets between them.

The rolls are driven by gears 11 and 12, which are securedone to each shaft and which mesh together. Thegears are driven by a beltwheel 15 bya belt 14: from a source of power. The bed-plate rests on suitable timbers 13. Rock-crushing rolls embodying the several elements just described and known as Cornish rolls have been in common use for many years. My invention consists in applying to a pair of rolls a grinding-shoe which will act in conjunction with the crushing-rolls and grind the material, which they crush between them at one operation to a much finer product than they alone are capable of making at one or two or even three passages of the ore between them,and thus make of the rolls pulverizers as well as crushers.

My roller-pulverizer consists of a triangular shoe 16, having its sides 17 and 17 concaved, with curves concentric with the peripheral curve of the surface of the rolls. 1 place this shoe underneath the rolls with its apex 18 extending up between them and with its concaved sides fitting quite closely up to the peripheries of the rolls. I support the shoe on a bar 19. One end of this bar is preferably supported on a spring 20 and a bolt 21. The bolt passes through. the base of the crusher and through the end of the bar, and the spring is placed around the bolt and between the crushers base and the bar and forms a downward, resilient, and yielding support for that end of the shoes supporting-bar. The opposite end is supported by a bolt 22, which passes loosely through it and which projects from a bracket 23, that is re movably secured to the adjacent end of the crusher-frame. The bolt 21 projects above the bracket, and a ed to the rod and bears against the washer.

The grinding-shoe is thus supported on a vertically-yielding base that can be adjusted by turning the nut-wrench to stand at any desired distance from the rolls or to bear hard against both.

In Fig. 2 a modification is illustrated. The form of the shoe is the same as shown in Fig. 1; but the grinding-surfaces are provided With depressions 30, which allow the pulverized material lateral passage from the grinding-surfaces.

In Fig. 3 a second modification is illustrated. In this modification the faces of the shoe are provided with dovetailed recesses 31, in which a hardened-steel dovetailed block 31 is placed. This block projects slightly above the surface of the shoe and receives the wear of grinding the ore.

Where a grinding-shoe is used with highspeed rolls and on a hard ore, they are liable to heat. To avoid their getting too hot, I form a chamber 32 in them and thread a Water-inlet pipe 33 to one side and a water-outlet pipe 34: to the opposite side, as shown in Fig. 4E, and keep cold water flowing constantly into and from the chamber. For slow-running rolls, however, this water-chamber is not needed.

The operation of my ore crushing and pulverizing machine is as follows: The ore or rock is first broken into pieces of about from one-quarter to three-quarters of an inch in size and then fed directly between the rolls, which are rotated towardeach other by the belt-pulley and gears. The rock is drawn between the rolls by their rotary motion and as it passes through them is crushed. The ore is then divided by the apex of the shoe, part of it flowing under one roller and part under another and over the concave surfaces of the shoe. Here the ore is ground by the revolving surface of the rolls pressing it against the surface of the shoes and wedging and rolling it between them, and by varying the distance of the shoe from the rolls the ore may be ground from ten to one hundred mesh at one passage of the ore through them. This shoe can be applied to crushing-rolls in use with very little expense and will increase their capacity to produce a finely-pulverized product several times.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a combined crushing and pulverizing machine the combination of the supportingbase,a fixed shaft on said base,a movable shaft mounted on said base, rock and ore crushing rolls operated on said shafts in alinement with one another and in rolling relation to one another, an adjustable, resilient buffer arranged to hold one roll in a predetermined, yielding and resilient relation to the other roll, with agrinding-block arranged to extend between said rolls and to engage their peripheral surfaces, the supporting-bar, the spring between one end of said bar and said base, an adjustable bolt passing through said spring and arranged to secure said bar to said base, a removable bracket secured to said base, a vertical adj usting-rod extending from the free end of said support through said bracket, a spring around said rod and resting in said bracket, and a wrench-nut threaded on said rod and arranged to bear on said spring, substantially as described.

2. The combination with asuitable base and crushing-rolls, of a grinding-block located below said rolls and arranged to cooperate with the rolls to perform the pulverizing function, a bar for supporting the block, a spring between one end of said bar and the base, an adjustable bolt passing through said spring and arranged to secure said bar to the base, a removable bracket secured to said base, a vertical adjusting-rod extending from the free end of said supporting bar through said bracket, a spring around said rod and resting on said bracket, and a wrench-nut threaded on said rod and arranged to bear on said spring.

In testimony whereof I affix my signature in presence of two witnesses.

ARON M. BEAM.

Witnesses:

WM. E. WILD, CLAUDE A. DUNN. 

